The gerund after prepositions
%%adjectiv + prepostions + gerund%%
(to) be %%afraid of%% doing sth.
(to) be %%excited about%% doing sth.
(to) be %%good/bad%% at doing sth.
(to) be %%interested in%% doing sth.
(to) be %%keen on%% doing sth.
(to) be %%tired of%% doing sth.
^^noun + preposition + gerund^^
the ^^chance of^^ doing sth.
the ^^danger of^^ doing sth.
the ^^hope of^^ doing sth.
the ^^idea of^^ doing sth.
the ^^reason for^^ doing sth.
the ^^way of^^ doing sth.
==verb + preposition + gerund==
(to) ==believe in== doing sth.
(to) ==decide against== doing sth.
(to) ==dream of/about== doing sth.
(to) ==look forward== to doing sth.
(to) ==talk about/of== doing sth.
(to) ==think of== doing sth.
(to) ==worry about== doing sth.